>What matters is whether we need to add an abstract character to represent
>it. I and others have suggested that the assumed encoding of U+0063 U+0068
>is adequate. The way to argue that a new abstract character is necessary
>is to demonstrate that there are textual processes that people regularly
>want to do in software for which the expected results cannot be achieved
>(using reasonable means) without the proposed new character.

IOW, show that the U+0063 U+0068 coding is not adequate since in Slovak it
is possible to have the words that have c followed by h which is not the
"letter" 'ch'. If this difference is true that a separate codepoint is
needed to tell the difference between "ch" and "c" followed by "h".